/**
 * Malloc Behavior Study
 * Julien Etienne, 2008
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <stdlib.h>
#include <stdio.h>
#include <malloc.h>

void printMallinfo(){
	struct mallinfo myMallinfo = mallinfo();
	printf(
		"Free: %9d, Allocated: %9d, Mmaped space: %9d\n",
		myMallinfo.fordblks,
		myMallinfo.uordblks,
		myMallinfo.hblkhd
		);
}

int main(
	int argc __attribute__((unused)),	/* Remove the attribute unused warning */
	char **args __attribute__((unused))
	){

	void   *ptrA = NULL;
	void   *ptrB = NULL;

	printMallinfo();
	for(size_t size=1; size<1024*1024*50;size*=2){
		ptrB = ptrA;
		ptrA = malloc(size);
		free(ptrB);

		printf("Size: %9d, ptrA: %p ", size, ptrA);
		printMallinfo();
	}

	free(ptrA);
	printMallinfo();

	return EXIT_SUCCESS;
}

